Film-Tech Cinema Systems
Film-Tech Forum

Post New Topic  Post A Reply
my profile | my password | register | search | faq & rules | forum home
  next oldest topic   next newest topic
» Film-Tech Forum   » Operations   » Film Handlers' Forum   » Veronese (LX1600) Rectifier Problem

Author Topic: Veronese (LX1600) Rectifier Problem
Andy Jenkin
Film Handler

Posts: 25
From: London, UK
Registered: Jun 2014

 - posted 09-04-2017 12:24 PM      Profile for Andy Jenkin   Author's Homepage   Email Andy Jenkin   Send New Private Message       Edit/Delete Post 
Hi there,

We have a pair of Veronese LX1600 portable 35mm projectors, however only one of the two rectifiers will strike either lamp successfully. The other one will power the projector fine, but cannot get the lamp to strike. When you power it on you can see the lamp pulsing every second or so, but it will never actually strike and maintain an arc, even when the current is at 100%.

It reminds me of a problem I had with an Irem N3, which was caused by the main relay not activating. The only relay I can see inside the rectifier, a 24V DC one on the main board, does seem to be working, as I can see the internal connections being made through the clear casing.

I can't see anything obvious, nothing burnt out, no bulging capacitors. Any ideas of what else to try? I'd really like to get this pair working!



 |  IP: Logged

Sean McKinnon
Phenomenal Film Handler

Posts: 1561
From: Peabody Massachusetts
Registered: Sep 2000

 - posted 09-08-2017 12:37 PM      Profile for Sean McKinnon   Email Sean McKinnon   Send New Private Message       Edit/Delete Post 
I might start by measuring the no load voltage if you know how to do that (be careful if you don't disconnect the igniter you can fry your meter)

It sounds to me like the igniter is firing without enough no load voltage behind it to establish the arc. I would check the mechanism used to signal to the igniter when the OCV is high enough (most likely a zener diode) and I would check any large capacitors.

 |  IP: Logged

All times are Central (GMT -6:00)  
Post New Topic  Post A Reply Close Topic    Move Topic    Delete Topic    next oldest topic   next newest topic
 - Printer-friendly view of this topic
Hop To:

Powered by Infopop Corporation

The Film-Tech Forums are designed for various members related to the cinema industry to express their opinions, viewpoints and testimonials on various products, services and events based upon speculation, personal knowledge and factual information through use, therefore all views represented here allow no liability upon the publishers of this web site and the owners of said views assume no liability for any ill will resulting from these postings. The posts made here are for educational as well as entertainment purposes and as such anyone viewing this portion of the website must accept these views as statements of the author of that opinion and agrees to release the authors from any and all liability.

© 1999-2018 Film-Tech Cinema Systems, LLC. All rights reserved.